C++保存成员函数指针

成员函数指针保存：
char mf_addr_[16];

void (DestT::memfun)(int)；memcpy(&mf_addr_,&memfun,sizeof(memfun));DEMO:class Signal1{public:template void connect(DestT dest,void (DestT::memfun)(int)){inst_ = (void)dest;assert(sizeof(memfun)<=sizeof(mf_addr_));memcpy(&mf_addr_,&memfun,sizeof(memfun));call_fun_ = &call_mf;}void emit(int arg) const{call_fun_(inst_,mf_addr_,arg);}private:void inst_;char mf_addr_[16];void (call_fun_)(void ,const char ,int);

template static void call_mf(void inst,const char memfun,int arg){void (DestT::mf)(int);memcpy(&mf,memfun,sizeof(mf));((static_cast(inst))->mf)(arg);}};

class Sender{public:Signal1 s_;void doSignal(int i){s_.emit(i);}};

class Receiver{public:void onSignal(int i){cout<<"signal with "<<i<<endl;}};



int main(int argc,char* argv[]){Sender sender;Receiver receiver;sender.s_.connect(&receiver, &Receiver::onSignal);sender.doSignal(5);return 0;}

原文链接: https://www.cnblogs.com/gelare/p/12900464.html

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